diff --git a/Zend/tests/stack_limit/stack_limit_014.phpt b/Zend/tests/stack_limit/stack_limit_014.phpt
index 144c64ad39ea..8b2d57b24a95 100644
--- a/Zend/tests/stack_limit/stack_limit_014.phpt
+++ b/Zend/tests/stack_limit/stack_limit_014.phpt
@@ -9,6 +9,7 @@ if (getenv("SKIP_SLOW_TESTS")) die('skip slow test');
 zend_test
 --INI--
 ; The test may use a large amount of memory on systems with a large stack limit
+zend.max_allowed_stack_size=512K
 memory_limit=1G
 --FILE--
 <?php
diff --git a/ext/mysqli/tests/mysqli_fetch_array_large.phpt b/ext/mysqli/tests/mysqli_fetch_array_large.phpt
index fa8d33b76964..dd77cf928202 100644
--- a/ext/mysqli/tests/mysqli_fetch_array_large.phpt
+++ b/ext/mysqli/tests/mysqli_fetch_array_large.phpt
@@ -11,6 +11,7 @@ require_once 'skipifconnectfailure.inc';
 all
 --INI--
 memory_limit=-1
+max_execution_time=5
 --FILE--
 <?php
     require_once 'connect.inc';